and abc. after five months of being away on medical leave, our colleague, robin roberts, returned home, back to the anchor desk. >> fantastic having her back. she was gone for 174 days, for a life-saving bone marrow transplant. she sat down with her friend, diane sawyer, for an intimate conversation. >> thelma and louise ride again. >> reporter: for seven years, we were next to each other, facing every morning. the good days, the tough days, and then, good days again. when you wake up in the morning, what's different now? >> i feel pretty much like myself. i mean, for many, many days and months, it was just a fogginess. i was faking the funk for a long time. i was faking the funk, for a long time. you knew i was. we just want to comfort those people who want to comfort us. >> reporter: comfort, through the hard reality that comes with the miracle of a bone marrow transplant.